Knowing thyself is the height of wisdom.

I shall never fear or avoid things of which I do not know.

I am wiser than this man, for neither of us appears to know anything great and good; but he fancies he knows something, although he knows nothing; whereas I, as I do not know anything, so I do not fancy I do. In this trifling particular, then, I appear to be wiser than he, because I do not fancy I know what I do not know.

If measure and symmetry are absent from any composition in any degree, ruin awaits both the ingredients and the composition... Measure and symmetry are beauty and virtue the world over.

True knowledge exists in knowing that you know nothing.

Be of good hope in the face of death. Believe in this one truth for certain, that no evil can befall a good man either in life or death, and that his fate is not a matter of indifference to the gods.

I know one thing, that I know nothing.